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    <div id="xxx">
        汪汪汪{{nextdream}}嘎嘎嘎
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    <script>
        let obj1 = { name: "张三", age: 20 }
        function observe() {
            let keys = Object.keys()
        }
        // let obj = Object.defineProperty({}, "name", {
        //     configurable: true,
        //     enumerable: true,
        //     get() {
        //         console.log("lalalala")
        //         return "我是伞兵"
        //     },
        //     set() {
                // console.log("set:", newvalue);
        //     }
        // })
    </script>
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